C#gridview 多选

以下是C#中使用GridView实现多选的示例代码：

private void gridView1_MouseDown(object sender, MouseEventArgs e)
{
    GridView view = sender as GridView;
    GridHitInfo info = view.CalcHitInfo(new Point(e.X, e.Y));
    if (info.InRow && info.HitTest != GridHitTest.RowIndicator)
    {
        view.FocusedRowHandle = info.RowHandle;
        if (Control.ModifierKeys == Keys.Shift)
        {
            int startRow = Math.Min(info.RowHandle, lastRowHandle);
            int endRow = Math.Max(info.RowHandle, lastRowHandle);
            SelectRows(startRow, endRow);
        }
        else if (Control.ModifierKeys == Keys.Control)
        {
            if (view.IsRowSelected(info.RowHandle))
            {
                view.UnselectRow(info.RowHandle);
            }
            else
            {
                view.SelectRow(info.RowHandle);
            }
            lastRowHandle = info.RowHandle;
        }
        else
        {
            SelectRows(info.RowHandle, info.RowHandle);
            lastRowHandle = info.RowHandle;
        }
    }
}

private void SelectRows(int startRow, int endRow)
{
    for (int i = startRow; i <= endRow; i++)
    {
        gridView1.SelectRow(i);
    }
}

以上代码实现了在GridView中使用鼠标进行多选的功能，支持Shift键和Ctrl键进行多选操作。